You have to compare screen resolutions as well as PC hardware, you are not even playing at 720P so you should just grab a $150 GPU or so and play on, if you gamed on 3 1080P monitors then you should be looking at $800 worth of graphics power.

maybe u right ....
you said i'm not playing 720p , how did you say that ? i said my monitor can support 1360*768 resolution ..... and it's not more than 720 ? which number you talking about ? horizontal or vertical ?
in al game i play 1360*768 @ 60 hz.... and getting good fps....
exactly which monitor res is above 720p or 1080p ....?
whats your scale pls describe that.